Improvement in steam-boiler furnaces



ATENE Erice.,

JOSEPH H. WEBSTER, OF ST. LOUIS, MISSOURI.

IMPROVEMENT IN STEAM-BOILER FURNACES.

Specification forming part of Letters Patent No. 53,367, dated March 20,1866.

To all whom it may concern:

Be it known that I, JOSEPH H. WEBSTER, of the city and county of St.Louis, and State of Missouri, have invented a new and useful Improvementin Smoke-Flues for Steam-Boiler Furnaces; and I do hereby declare thatthe following is a. full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon.

Of the accompanying drawings, Figure l is a longitudinal section of asteam-boiler to which one of the improved smoke-fines is attached. Fig.2is a transverse section through the breech on the forward end of theboiler.

The nature of my invention consists in the construction and arrangementof a smoke-due connected directly with thebreechin g of steamboilers andreboX of the furnace, and providing the same with a pipe connecteddirectly with the boiler, whereby an increased draft in the smoke-flueis obtained, which serves to attract the heated air and smoke, which,when within said flue, are forced repeatedly through the furnace andiues of the boiler, thereby burning an increased per cent. of thc carbonof the smoke before the same is conveyed oft' through the chimney.

I am aware that furnaces supplied with smoke-dues, in combination withsteam-boilers for the combustion of smoke, have been used; but the same,by practical tests, have been found deficient in the requiredconstruction and arrangement of said flues to insure the retention ofthe smoke sufficiently long within the furnace and iiues of the boilerto secure the perfect combustion thereof. My improvements are speciallydirected to this end, and by con necting the smoke-flue directly withthe breeching of the boiler and the rebox and creating an increaseddraft in said ue by the introduction of steam therein, in the mannerherein described, it is obvious that the increased draft obtained servesto attract the smoke and at the same time impel it through the furnaceand dues of the boiler, which, as practice has proved, accomplishes theend sought for.

To enable those skilled in the art to make and use my improved lues, lwill proceed to describe its construction and operation.

I employ a smoke-flue, A, which connects the breeching B with thefire-box O. After the fire has been burning long enough to heat theflrebox C the smoke, or at least a portion of it, will enter the ue Aand be conducted through it again into the re-box,where a portion of thecarbon of the smoke will be burned. The smoke-due A and the chimney Dare both connected with the breeching B, and there is not-hin ginterposin g between them to prevent the smoke from entering either orboth of them at the same time. Therefore the smoke will pass most freelyinto the avenue which has the stronger draft.

In order to increase the draft in the ilue A, I take a small steam-pipe,a, one end of which is inserted into the boiler E above the waterline,and the other end of said steam pipe is arranged to discharge steamtaken from the boiler into the flue A in the direction indicated by thered arrow in the drawings. The lower portion ofthe breeching isomittedin the model and drawings for the purpose of disclosing theseveral parts to view. In practice this part will be closed up.

Although the flue A is represented as discharging the smoke into thetire-box in the accompanying drawings, it is obvious that the dischargemight be made farther back under' the boiler; but in that event thesmoke would not be submitted to so high a degree of heat as it wouldwere it to again pass through the lire-box, and a less amount of thecarbon of the smoke would thereby be consumed.

By the above described arrangement the smoke will ordinarily passseveral times through the ues of the boiler and thence back again intothe fire-box without going up the chimney. A large portion of the carbonof the smoke will thereby be consumed, and the heated air and smokebeing retained along time in and around the boiler, a great economy offuel will thereby be effected.

Having thus fully described my invention, what I claim therein as new,and desire to secure by Letters Patent, is-

The construction and arrangement of smokeflue A and steam-pipe a, incombination with breeching B and tire box C, substantially in. the:manner and for the purpose herein set forth.

JOSEPH H. WEBSTER. Witnesses:

M. RANDOLPH, A. WAGNER.

